Discussions By Condition: Sexual conditions

Painful urination and red spots on penis shaft please help

Hello, any help would be much appreciated. I had unprotected sex with a girl about three weeks ago, and since then every time I urinate I am in extreme pain, except when i drink a lot of water. Basically if my urine is white it doesn't hurt. Now recently I have noticed groups of tiny red spots that are somewhat itchy on my penis shaft. I am very worried, and I am going to get tested tomorrow. Is this herpes? Thank you.